So if you drop a gun in a certain position, it goes off,
Why we need this: your being held hostage, your asked to drop your gun, BAM it shoots your enemy catching them by surprise, giving you the upper hand in CQC.
Reference: in tactical assault , if you bang your gun on the wall hard enough, it goes off. Also In Indiana Jones and the kingdom of the Crystal skull, Indy drops his gun when held at gun point and it goes off surprisingly all of the other Nazis giving him the upper hand eventually leading to his escape.